#version 300 es                        
layout(location = 0) in vec3 a_position;

uniform mat4 u_matrix;

out vec3 color;

void main()                            
{
	gl_Position = u_matrix * vec4(a_position, 1.0);
	color = mix(vec3(0.180, 0.467, 0.153), // dark green
				vec3(0.660, 0.670, 0.680), // stony gray
				a_position.y);
}
